I have created a SSRS report and need to have more than one parameter for the report. I am using a stored procedure as my base dataset for the report. I have also created a separate dataset for each of the respective parameters. I have assigned the parameter to the appropriate dataset.

When I preview the report and I select the just one parameter I receive an error message that I need to select a parameter for the other available parameters. For each parameter I have checked the allow null checkbox.

I am a bit rusty on this, so sorry if I am a bit off the mark. In BIDS 2005 report parameters and query parameters are different. It is possible for them to get out of sync so that the report parameters are not feeding the query parameters as expected. I would try deleting the report parameters and recreating them. Hope this helps. Good luck.